Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 28, NWS Boston/Norton, MA

June 30, 2019Dukes County, Nantucket County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 30, 2019, 4:59 PM EDT for Dukes County, Nantucket County, Massachusetts. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 30, 2019, 4:59 PM EDT (20:59 UTC)
Expired
Jun 30, 2019, 5:26 PM EDT
In force
27 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Dukes County, MA, Nantucket County, MA

The radar

The Boston radar (KBOX), 85 km from the middle of the area, began a volume at 21:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 9.0 hours before the alert went out and 52 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2019-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2019-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1248 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

821 
WUUS51 KBOX 302059
SVRBOX
MAC007-019-302200-
/O.NEW.KBOX.SV.W.0028.190630T2059Z-190630T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
459 PM EDT Sun Jun 30 2019

The National Weather Service in Boston/Norton has issued a

* Severe Thunderstorm Warning for...
  West central Nantucket County in southeastern Massachusetts...
  Dukes County in southeastern Massachusetts...

* Until 600 PM EDT.

* At 459 PM EDT, a severe thunderstorm was located over Edgartown,
  moving southeast at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is possible. Expect damage to 
           trees and power lines.

* Locations impacted include...
  Nantucket, Oak Bluffs, Edgartown, Tisbury, West Tisbury and
  Chilmark.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4133 7033 4133 7068 4145 7070 4148 7064
      4149 7058 4148 7055 4142 7053 4142 7043
      4134 7044 4134 7033 4135 7031 4131 7025
      4130 7029
TIME...MOT...LOC 2059Z 337DEG 6KT 4139 7046 

HAIL...1.00IN
WIND...60MPH
 
$$

Frank
2 follow-up statements
985 
WWUS51 KBOX 302115
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
515 PM EDT Sun Jun 30 2019

MAC007-019-302200-
/O.CON.KBOX.SV.W.0028.000000T0000Z-190630T2200Z/
Nantucket MA-Dukes MA-
515 PM EDT Sun Jun 30 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR WEST CENTRAL NANTUCKET AND EAST CENTRAL DUKES COUNTIES...

At 514 PM EDT, a severe thunderstorm was located over Edgartown,
moving southeast at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is possible. Expect damage to trees 
         and power lines.

Locations impacted include...
Nantucket, Oak Bluffs, Edgartown, West Tisbury and Chilmark. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4133 7033 4133 7068 4137 7065 4142 7059
      4141 7056 4142 7053 4142 7043 4134 7044
      4134 7033 4135 7031 4131 7025 4130 7029
TIME...MOT...LOC 2114Z 337DEG 13KT 4136 7044 

HAIL...1.00IN
WIND...60MPH
 
$$

Frank
597 
WWUS51 KBOX 302126
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
526 PM EDT Sun Jun 30 2019

MAC007-019-302136-
/O.CAN.KBOX.SV.W.0028.000000T0000Z-190630T2200Z/
Nantucket MA-Dukes MA-
526 PM EDT Sun Jun 30 2019

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL NANTUCKET AND
EAST CENTRAL DUKES COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 4133 7033 4133 7068 4137 7065 4142 7059
      4141 7056 4142 7053 4142 7043 4134 7044
      4134 7033 4135 7031 4131 7025 4130 7029
TIME...MOT...LOC 2125Z 337DEG 6KT 4134 7043 

$$

Frank

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 4:09 PM EDT, 50 minutes earlier.

Area forecast discussion, Jun 30, 4:09 PM EDT, 50 minutes before
Area Forecast Discussion
National Weather Service Boston/Norton MA
409 PM EDT Sun Jun 30 2019

.SYNOPSIS...

Scattered showers and thunderstorms through early evening with
embedded threats of gusty winds and small hail. Lingering showers
overnight with dry conditions Monday. Another chance at showers
Monday night into Tuesday morning, while dry through the day.
Build up of heat and humidity Wednesday through Friday with the
chance of showers and thunderstorms each day preceding a cold
front which will sweep through by Saturday.

&&

.NEAR TERM /UNTIL 8 PM THIS EVENING/...

4 pm update ...

*/ Highlights ...

 - Scattered showers and thunderstorms concluding by evening

 - Some of the storms will still be strong to severe with
   embedded threats of gusty NW winds and hail of varying sizes,
   possibly up to around 1-inch

 - Locally heavy downpours as well which may contribute to
   localized urban / poor-drainage flooding

*/ Discussion ...

Arc of scattered showers and thunderstorms out of which we have
received numerous reports of hail and gusty winds, some of the
hail at or exceeding 1-inch and wind gusts in excess of 40 mph.
This in addition to frequent lightning and heavy rainfall, the
latter contributing to some localized urban / poor drainage
flooding, especially in dense urban centers (i.e., Boston).

Trend is for the arc to progress SE out to sea with perhaps not
too much loss in strength given it is on the leading edge of the
vort-lobe and waters are warm these days. Potential latch onto
sub-tropical moisture S. Behind the arc, seeing reports of gusty
NNW winds more than likely with cold air advection parent with
subsiding air. The boundary layer well mixed as the vort-lobe
sweeps with localized enhancement to the winds, easily mixing
down to the surface. Seeing generally 20 to 30 mph gusts.

Further N, still beneath the cold pool, and conditions clear and
subsidence immediate behind the vort-lobe weakens with progression
S, we're seeing the re-emergence of scattered thunderstorms across
N New England. Expectation is for this activity to drift S but
to diminish with the conclusion of daytime heating as the sun
sets. With this activity, some small hail is possible as well as
heavy downpours.

Will be busy for the next few hours but then a downward trend is
to be expected hence the discussion through 8 pm. Continue to
monitor the situation, adjust the forecast, and warn as necessary.

Previous discussion ...

It's on. Main vort-lobe is rotating through the region with parent
cold pool. The main core of colder air aloft just getting into S
New England. Differential cyclonic vorticity advection (DCVA) as
noted by SPC is promoting ascent through an environment marginal
shear around 30 kts, steep lapse rates 7.0-7.5 C/km through H3,
and surface- based instability upwards of 2k J/kg. Daytime heating
increasing the temperature - dewpoint spread and thus an inverted-
V boundary layer profile above which a NW 0-6 km mean wind around
35 kts prevails. Multi-cellular storm mode that has pulsed at times.

Just beginning to gather reports. Earlier there was several wind
reports but now the hail reports are coming in with gusts around
40 mph. Difficult is the pulse-type nature of storms. Gathering
a variety of hail reports, mainly pea, but some bigger mixed in,
isolated, where storms pulse upwards. The warning criteria is
not so clear-cut as cores as observed via WSR-88D are so thin
and narrow. Looking at the bigger cores for warning. Prevailing
in the grids the threat of gusty winds and small hail through
the late afternoon.

Heavy rain also being observed yet storm cells are progressive.
Nevertheless if training elements with storm motion there remains
the threat of localized urban / poor-drainage flood issues.

Right now it appears the HRRR, ARW and NMM members of the WRF
are doing the best with the current situation. The 30.12z HREF
having shifting its probability matched means slightly W, however
still thinking the threat exists over all of S New England with
respect to damaging winds and the potential of large hail with
the stronger storms.

&&

.SHORT TERM /8 PM THIS EVENING THROUGH MONDAY NIGHT/...

Tonight ...

Clearing out. Behind the vort-lobe we should see subsidence /
sinking air prevail. Cloud decks lingering, lower along the E
coastline of MA as trapped low-level moisture is slow to clear
out in addition to a N fetch over the ocean.

Have to watch winds closely across the interior. Antecedent
rains along with nocturnal cooling as clear conditions prevail
could lead to some shallow ground fog within sheltered interior
valleys of NW MA. It's a low risk and the thinking is because of
the very low dewpoints observed at max heating of the day, much
lower than forecast lows in the 50s. The fog risk will be for
those areas that got a good soaking earlier today.

Monday into Monday night ...

Fantastic summer day. Beneath weak ridging and drier air behind
the exiting mid-upper level low out to sea will see plenty of
sunshine and highs getting well into the 80s. Overall light W
flow so expect sea breezes along the coast towards midday.

But during the overnight period, the ridge shifting E, will see
the return of isentropic ascent out ahead of a weak trof axis,
falling heights, and some mid-level energy. Battle against the
ridge and drier air settled to the E, will hint at some slight
chance PoPs for the far W zones by Tuesday morning.

&&

.LONG TERM /TUESDAY THROUGH SUNDAY/...

Highlights...

* A few lingering showers possible Tue am, otherwise dry and warm
  Tue afternoon and Wed at least away from the immediate coast

* Very warm to hot Thu, July 4th with a low risk for a spot shower
  or t-storm across the interior

* Very warm to hot weather continues Fri/Sat with a better chance
  for scattered showers and thunderstorms, but not a washout

Details...

Tuesday and Wednesday...

We may see a few lingering showers Tuesday morning associated with a
weak shortwave.  Otherwise, a ridge of high pressure will result in
dry weather with summer-like warmth.  Highs should reach well into
the 80s Tue and especially Wed when a few locations may flirt with
90.  A relatively weak pressure gradient will result in sea breezes
at times, which will result in cooler temperatures at times along
the immediate coast.

Thursday through Saturday...

Upper level ridging across the southeast will flex its muscles,
resulting in rising height fields into southern New England.  This
should result in very warm to hot weather with highs in the upper
80s to lower 90s across much of the region, but cooler conditions
expected at times along the immediate coast with the potential for
sea breezes at times.

There should be some modest instability developing on Thu, July 4th.
However, limited synoptic scale forcing will probably result in
mainly dry weather.  However, a spot shower or t-storm is certainly
possible across the interior. Appears to be a better chance for
scattered showers and thunderstorms sometime Fri and/or Sat with an
approaching cold front.  Still not expecting a washout though.

Sunday...

Perhaps we cool off a bit by Sunday behind a cold front, but quite a
bit of uncertainty in the forecast this far out.

&&

.AVIATION /20Z SUNDAY THROUGH FRIDAY/...

Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

Short Term /through Monday night/ ... High confidence.

18z update (no major changes) ...

Through 0z ...
SCT SHRA / TSRA through 0z at the latest. Some TSRA will be strong
to severe with +RA / GR with TEMPO IFR-LIFR VSBYs down around 1-2SM,
also possibly 34020G30KT. Otherwise, low-end VFR CIGs with NW winds
around 320 10 to 15 kts. Activity sweeping NW to SE.

Tonight ...
Isolated SHRA lingering over E New England dissipating, turning
dry. Focus on lower conditions over SE New England and within
the interior valleys of NW MA. Could be a situation of MVFR-IFR
CIGs over SE-coastal terminals, patchy dense IFR fog developing
in NW MA interior valleys. N winds around 5 to 10 kts, lower
across the interior.

Monday into Monday night ...
VFR. Coastal sea breezes developing late morning into the afternoon.
Mid-high cloud encroaching late into the overnight hours. A low
risk of -SHRA for far W CT River Valley terminals.

KBOS Terminal ...
TSRA out. Keeping an eye on additional activity upstream over S NH.
Presently no threats at this time. NW winds around 330 prevailing
around 10 to 15 kts.

KBDL Terminal ...
TSRA immediately S of the terminal will move out. Watching storm
activity over S NH but optimism it will dissipate before reaching
the airspace. Otherwise NW winds around 320 prevailing around
10 to 15 kts.

Outlook /Tuesday through Friday/...Moderate confidence.

Tuesday through Tuesday Night: VFR. Breezy.

Wednesday through Wednesday Night: VFR.

Independence Day through Thursday Night: VFR. Slight chance
SHRA, slight chance TSRA.

Friday: VFR. Breezy. Chance SHRA, chance TSRA.

&&

.MARINE...

Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

Short Term /through Monday night/ ... High confidence.

4 pm update ...

Through 8 pm ...
W winds across the waters around 10 to 15 kts with gusts up to
20 kts, bit more E along the E MA coastline. Now into early
evening will be monitoring for thunderstorm activity along the
near shore waters. The threat of NW gales with stronger storms
along with hail upwards of an inch. Will make for dangerous
conditions for all craft on the waters. Keep an eye on the W
sky.

BUT OF IMPORTANT NOTE ... behind the arcing line of shower and
thunderstorm activity, a brief period of 15 to 25 kt winds with
gusts up to gale force are possible ... this may persist into
the early evening hours before diminishing.

Tonight ...
Storm activity diminishing to isolated showers during the evening
hours before dissipating overnight. N winds prevailing around
10 to 15 kts. Generally low clouds over the water forecast
that'll dissipate towards Monday morning. Lower confidence with
respect to marine fog.

Monday into Monday night ...
Northerly winds 10-20 kt into early Monday, then winds becoming
onshore in the afternoon over nearshore waters as sea breezes
develop. Winds becoming S then W during the overnight hours
Monday night into Tuesday morning.

Outlook /Tuesday through Friday/...Moderate confidence.

Tuesday through Independence Day: Winds less than 25 kt.

Thursday Night: Winds less than 25 kt. Slight chance of rain
showers, slight chance of thunderstorms.

Friday: Winds less than 25 kt. Chance of rain showers, chance
of thunderstorms.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...

CT...None.
MA...None.
RI...None.
MARINE...None.

&&

SYNOPSIS...Frank/Sipprell
NEAR TERM...Sipprell
SHORT TERM...Sipprell
LONG TERM...Frank
AVIATION...Frank/Sipprell
MARINE...Frank/Sipprell
Hazardous weather outlook, Jun 30, 4:12 PM EDT, 47 minutes before
Hazardous Weather Outlook
National Weather Service Boston/Norton MA
412 PM EDT Sun Jun 30 2019

CTZ002>004-MAZ002>024-026-RIZ001>008-012015-
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-
Western Essex MA-Eastern Essex MA-Western Hampshire MA-
Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA-
Southern Worcester MA-Western Norfolk MA-Southeast Middlesex MA-
Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-
Western Plymouth MA-Eastern Plymouth MA-Southern Bristol MA-
Southern Plymouth MA-Barnstable MA-Dukes MA-Nantucket MA-
Northern Middlesex MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-Bristol RI-
Washington RI-Newport RI-Block Island RI-
412 PM EDT Sun Jun 30 2019

This Hazardous Weather Outlook is for northern Connecticut, all of
Massachusetts east of Berkshire County, and Rhode Island.

.DAY ONE...Tonight.

Scattered strong thunderstorms through roughly 8 pm, some of which
may become severe. Large hail will be the primary threat, with strong
to locally damaging wind gusts a secondary concern. Heavy rainfall
may result in localized street flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

ANZ230>237-250-251-254>256-012015-
Boston Harbor-Cape Cod Bay-Nantucket Sound-Vineyard Sound-
Buzzards Bay-Rhode Island Sound-Narragansett Bay-Block Island Sound-
Coastal waters east of Ipswich Bay and the Stellwagen Bank National
Marine Sanctuary-Massachusetts Bay and Ipswich Bay-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
Coastal Waters extending out to 25 nm South of Marthas Vineyard and
Nantucket-
Coastal Waters from Montauk NY to Marthas Vineyard extending out to
20 nm South of Block Island-
412 PM EDT Sun Jun 30 2019

This Hazardous Weather Outlook is for Massachusetts and Rhode
Island coastal waters.

.DAY ONE...Tonight.

Scattered strong thunderstorms through roughly 8 pm, some of which
may become severe. Gale force winds will be possible with these
storms as well as hail and heavy rainfall contributing to lower
visibility.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/us.nationalweatherservice.boston.gov

You can follow us on Twitter at
@NWSBoston

In the hours before

Local storm report, Jun 30, 2:44 PM EDT, 2 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
244 PM EDT SUN JUN 30 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0133 PM     HAIL             AMHERST                 42.38N  72.52W
06/30/2019  M0.75 INCH       HAMPSHIRE          MA   TRAINED SPOTTER

            TRAINED SPOTTER

0143 PM     HAIL             SHREWSBURY              42.30N  71.72W
06/30/2019  M0.75 INCH       WORCESTER          MA   AMATEUR RADIO

            AMATEUR RADIO

0152 PM     HAIL             AMHERST                 42.38N  72.52W
06/30/2019  M0.75 INCH       HAMPSHIRE          MA   AMATEUR RADIO

            NEAR BELCHERTOWN TOWN LINE

0210 PM     HAIL             METHUEN                 42.72N  71.18W
06/30/2019  M0.75 INCH       ESSEX              MA   TRAINED SPOTTER

            TRAINED SPOTTER

0227 PM     HAIL             PHILLIPSTON             42.55N  72.13W
06/30/2019  M0.75 INCH       WORCESTER          MA   AMATEUR RADIO

            AMATEUR RADIO

0242 PM     HAIL             BURRILLVILLE            41.95N  71.72W
06/30/2019  M0.75 INCH       PROVIDENCE         RI   AMATEUR RADIO

            AMATEUR RADIO

&&

EVENT NUMBER BOX1902512 BOX1902513 BOX1902514 BOX1902515 BOX1902516
BOX1902517

AED
Special weather statement, Jun 30, 3:17 PM EDT, 1 hour 42 minutes before
Special Weather Statement
National Weather Service Boston/Norton MA
317 PM EDT Sun Jun 30 2019

CTZ004-MAZ020-RIZ001>007-302015-
Windham CT-Southern Bristol MA-Northwest Providence RI-Bristol RI-
Washington RI-Eastern Kent RI-Western Kent RI-Newport RI-
Southeast Providence RI-
317 PM EDT Sun Jun 30 2019

...LINE OF STRONG THUNDERSTORMS MOVING SOUTHWARD ACROSS RHODE
ISLAND AND EASTERN CONNECTICUT...

At 316 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Killingly Connecticut to near Cranston
Rhode Island. Movement was southeast at 30 mph.

Pea to nickel size hail and wind gust to 30 mph will accompany these
storms.

Locations impacted include...
Providence, Warwick, Cranston, East Providence, Coventry, South
Kingstown, West Warwick, Johnston, North Kingstown, Newport, Bristol,
Plainfield, Portsmouth, Killingly, Barrington, Middletown,
Narragansett, Tiverton, Westport and East Greenwich.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when these storms approach. Winds may be strong enough to
produce minor damage, such as a few downed branches.

Frequent lightning was occurring. Lightning can strike far away from
the storm. Go inside a building or vehicle. Wait at least 30 minutes
until after the storm has passed to resume outdoor activities.

&&

LAT...LON 4141 7177 4146 7180 4164 7179 4165 7184
      4164 7192 4180 7202 4181 7139 4140 7095
      4147 7104 4149 7108 4144 7120 4149 7122
      4146 7123 4147 7127 4144 7131 4144 7141
      4140 7144
TIME...MOT...LOC 1916Z 327DEG 28KT 4179 7145 4179 7188

Field
Local storm report, Jun 30, 3:28 PM EDT, 1 hour 31 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
328 PM EDT SUN JUN 30 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0133 PM     HAIL             AMHERST                 42.38N  72.52W
06/30/2019  M0.75 INCH       HAMPSHIRE          MA   TRAINED SPOTTER

            TRAINED SPOTTER

0143 PM     HAIL             SHREWSBURY              42.30N  71.72W
06/30/2019  M0.75 INCH       WORCESTER          MA   AMATEUR RADIO

            AMATEUR RADIO

0152 PM     HAIL             AMHERST                 42.38N  72.52W
06/30/2019  M0.75 INCH       HAMPSHIRE          MA   AMATEUR RADIO

            NEAR BELCHERTOWN TOWN LINE

0210 PM     HAIL             METHUEN                 42.72N  71.18W
06/30/2019  M0.75 INCH       ESSEX              MA   TRAINED SPOTTER

            TRAINED SPOTTER

0227 PM     HAIL             PHILLIPSTON             42.55N  72.13W
06/30/2019  M0.75 INCH       WORCESTER          MA   AMATEUR RADIO

            AMATEUR RADIO

0242 PM     HAIL             BURRILLVILLE            41.95N  71.72W
06/30/2019  M0.75 INCH       PROVIDENCE         RI   AMATEUR RADIO

            AMATEUR RADIO

0305 PM     HAIL             KILLINGLY               41.83N  71.87W
06/30/2019  M0.75 INCH       WINDHAM            CT   TRAINED SPOTTER

0309 PM     HAIL             BRAINTREE               42.20N  71.00W
06/30/2019  M0.75 INCH       NORFOLK            MA   AMATEUR RADIO

            AMATEUR RADIO

0327 PM     HAIL             WARWICK                 41.70N  71.42W
06/30/2019  M1.00 INCH       KENT               RI   AMATEUR RADIO

            AMATEUR RADIO

&&

EVENT NUMBER BOX1902512 BOX1902513 BOX1902514 BOX1902515 BOX1902516
BOX1902517 BOX1902518 BOX1902519 BOX1902520

AED
Special weather statement, Jun 30, 3:28 PM EDT, 1 hour 31 minutes before
Special Weather Statement
National Weather Service Boston/Norton MA
328 PM EDT Sun Jun 30 2019

MAZ016-018-019-302015-
Eastern Plymouth MA-Eastern Norfolk MA-Western Plymouth MA-
328 PM EDT Sun Jun 30 2019

...STRONG THUNDERSTORM...

At 328 PM EDT, Doppler radar was tracking a strong thunderstorm over
Hanover, or near Weymouth, moving southeast at 15 mph.

Penny size hail and winds in excess of 40 mph will accompany this
storm.

Locations impacted include...
Plymouth, Weymouth, Marshfield, Hingham, Scituate, Pembroke,
Rockland, Duxbury, Hanover, Kingston, Norwell, Hanson, Cohasset,
Halifax and Plympton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not drive through flooded roads or underpasses. Avoid low lying
areas near small streams.

&&

LAT...LON 4198 7061 4198 7063 4196 7059 4191 7072
      4214 7094 4215 7094 4219 7098 4226 7082
      4218 7070 4218 7071 4201 7058
TIME...MOT...LOC 1928Z 326DEG 13KT 4216 7087

Frank
Local storm report, Jun 30, 3:40 PM EDT, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
340 PM EDT SUN JUN 30 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0133 PM     HAIL             AMHERST                 42.38N  72.52W
06/30/2019  M0.75 INCH       HAMPSHIRE          MA   TRAINED SPOTTER

            TRAINED SPOTTER

0143 PM     HAIL             SHREWSBURY              42.30N  71.72W
06/30/2019  M0.75 INCH       WORCESTER          MA   AMATEUR RADIO

            AMATEUR RADIO

0152 PM     HAIL             AMHERST                 42.38N  72.52W
06/30/2019  M0.75 INCH       HAMPSHIRE          MA   AMATEUR RADIO

            NEAR BELCHERTOWN TOWN LINE

0210 PM     HAIL             METHUEN                 42.72N  71.18W
06/30/2019  M0.75 INCH       ESSEX              MA   TRAINED SPOTTER

            TRAINED SPOTTER

0227 PM     HAIL             PHILLIPSTON             42.55N  72.13W
06/30/2019  M0.75 INCH       WORCESTER          MA   AMATEUR RADIO

            AMATEUR RADIO

0242 PM     HAIL             BURRILLVILLE            41.95N  71.72W
06/30/2019  M0.75 INCH       PROVIDENCE         RI   AMATEUR RADIO

            AMATEUR RADIO

0305 PM     HAIL             KILLINGLY               41.83N  71.87W
06/30/2019  M0.75 INCH       WINDHAM            CT   TRAINED SPOTTER

0309 PM     HAIL             BRAINTREE               42.20N  71.00W
06/30/2019  M0.75 INCH       NORFOLK            MA   AMATEUR RADIO

            AMATEUR RADIO

0325 PM     HAIL             CRANSTON                41.77N  71.48W
06/30/2019  M0.75 INCH       PROVIDENCE         RI   AMATEUR RADIO

            AMATEUR RADIO

0325 PM     HAIL             CRANSTON                41.77N  71.48W
06/30/2019  M1.00 INCH       PROVIDENCE         RI   AMATEUR RADIO

            AMATEUR RADIO

0327 PM     HAIL             WARWICK                 41.70N  71.42W
06/30/2019  M1.00 INCH       KENT               RI   AMATEUR RADIO

            AMATEUR RADIO

0329 PM     HAIL             WARWICK                 41.70N  71.42W
06/30/2019  M0.88 INCH       KENT               RI   AMATEUR RADIO

            AMATEUR RADIO

&&

EVENT NUMBER BOX1902512 BOX1902513 BOX1902514 BOX1902515 BOX1902516
BOX1902517 BOX1902518 BOX1902519 BOX1902521 BOX1902522 BOX1902520
BOX1902523

AED
Special weather statement, Jun 30, 4:26 PM EDT, 33 minutes before
Special Weather Statement
National Weather Service Boston/Norton MA
426 PM EDT Sun Jun 30 2019

MAZ023-302115-
Dukes MA-
426 PM EDT Sun Jun 30 2019

...STRONG THUNDERSTORM...

At 426 PM EDT, Doppler radar was tracking a strong thunderstorm over
Oak Bluffs, moving southeast at 10 mph.

Penny size hail and winds in excess of 40 mph will accompany this
storm.

Locations impacted include...
Oak Bluffs, Edgartown, Tisbury and West Tisbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.

&&

LAT...LON 4145 7070 4149 7061 4149 7058 4147 7055
      4142 7053 4142 7043 4136 7044 4134 7034
      4135 7031 4135 7030 4134 7030 4133 7032
      4135 7040 4134 7045 4133 7058
TIME...MOT...LOC 2026Z 321DEG 10KT 4143 7060

Frank

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 29, 11:31 PM EDTSpecial Weather StatementBOXEssex44 min
Jun 30, 12:03 AM EDTSpecial Marine WarningBOX42 min
Jun 30, 12:11 AM EDTSevere Thunderstorm WarningBOXEssex11 min
Jun 30, 12:21 AM EDTSpecial Weather StatementBOXWorcester39 min
Jun 30, 12:44 AM EDTSpecial Marine WarningBOX46 min
Jun 30, 12:59 AM EDTSpecial Weather StatementBOXNorfolk46 min
Jun 30, 12:34 PM EDTSpecial Weather StatementBOXMiddlesex41 min
Jun 30, 1:10 PM EDTSpecial Weather StatementBOXWorcester50 min
Jun 30, 1:19 PM EDTSpecial Weather StatementBOXHampshire41 min
Jun 30, 1:43 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Worcester47 min
Jun 30, 1:45 PM EDTSpecial Weather StatementBOXMiddlesex45 min
Jun 30, 1:51 PM EDTSpecial Weather StatementBOXWorcester39 min
Jun 30, 2:08 PM EDTSpecial Weather StatementBOXEssex37 min
Jun 30, 2:11 PM EDTSpecial Weather StatementBOXMiddlesex49 min
Jun 30, 2:26 PM EDTSpecial Marine WarningBOX64 min
Jun 30, 2:27 PM EDTSpecial Weather StatementBOXWorcester48 min
Jun 30, 2:29 PM EDTSpecial Weather StatementBOXSuffolk46 min
Jun 30, 2:33 PM EDTSevere Thunderstorm WarningBOXWorcester32 min
Jun 30, 2:35 PM EDTSevere Thunderstorm WarningBOXEssex40 min
Jun 30, 2:37 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex, Norfolk, Plymouth, Suffolk53 min
Jun 30, 2:39 PM EDTSpecial Marine WarningBOX66 min
Jun 30, 2:44 PM EDTSpecial Marine WarningBOX91 min
Jun 30, 3:18 PM EDTSpecial Marine WarningBOX27 min
Jun 30, 3:28 PM EDTSpecial Weather StatementBOXPlymouth47 min
Jun 30, 3:33 PM EDTSpecial Marine WarningBOX45 min
Jun 30, 3:36 PM EDTSevere Thunderstorm WarningBOXPlymouth54 min
Jun 30, 3:37 PM EDTSpecial Marine WarningBOX38 min
Jun 30, 3:38 PM EDTSpecial Marine WarningBOX67 min
Jun 30, 3:43 PM EDTSpecial Marine WarningBOX92 min
Jun 30, 3:58 PM EDTSevere Thunderstorm WarningBOXBarnstable, Plymouth62 min
Jun 30, 4:16 PM EDTSpecial Marine WarningBOX59 min
Jun 30, 4:26 PM EDTSpecial Weather StatementBOXDukes49 min
Jun 30, 5:06 PM EDTSpecial Marine WarningBOX54 min
Jun 30, 5:46 PM EDTSpecial Weather StatementBOXNorfolk44 min
Jun 30, 6:03 PM EDTSpecial Marine WarningBOX57 min
Jun 30, 6:14 PM EDTSpecial Weather StatementBOXBristol46 min
Jun 30, 6:51 PM EDTSpecial Weather StatementBOXNorfolk39 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2019Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.